Locomotive arch-brick.



squarely against the wall structure thus UNITED STATES PATENT oFFioE EDWARD M. CARROLL, or Pour TAMPA CITY, FLORIDA.

Applicationfmea octcber 8,1917. ser1a'1No.195,sss.- -v i To aZZ whoml t may concern:

' Be it known that I, 'EDWARD' M. CARROLL, a citizenof the United States, residing at Tampa City, in the county of Hillsborough and State of Florida, have invented Vcertain new and useful Improvements in Locomotive Arch-Bricks, of which the following is a specification.

This invention ,relates specifically to a form of brick especially adapted to be used in a locomotive boiler -furnace and generally to a septum wall/'composed of the brick, and itl consists in the novel features hereinafter described and claimed. E

A primary object of the'invention is to provide a brick of especial design and configuration whereby it may be used at the intermediate or side rows in the wall structure and whose function is, byreason of the disposition and arrangement-of its surfaces and features, to 'eliminate the necessity of having to clean the arches of the wall, to

save fuel, to protect the crown sheet'of the box, to prevent accumulation m thel lire boiler flues, and to protect the lower boiler fines from intense heat by effecting a uniform distribution of the heat to all of the fines, high and loi Vith these and other brick comprises abody which is rectangular in top pla-n, whereby one brick;` may fit i adjacent bricks in the providing' a continuous wall in-so far as @contact is concerned. But the bricks are so shaped that while they form several rowsA of arches in the wall structure, there are interstices or openings between each individual brick and the -adjacent bricks through which the heat may pass in relatively fine streams or .volumes thereby dividing the entire volume of the gas and effecting the yuniform distribution of the heat to the boiler fues as above referred to. i This is accomplished at the side portions as well as at the intermediate portions of the septum or arch wall'and hence the bricks used are of the'same dimensions, arrangement andconfignration.

The body of each brick sp1-@vided at fitsunder side with a 'concaved surface which of thebody, The

extends longit'u inally v body isconvexed and upper surface of the these surfaces are .disposedat an acute an- LOCOMOTIVE ARCH-BRICK.

l Specification of Letters Patent.

' tween its objects in view the at all portionsof the wall gle with relation to each otherwhe'reby the body is thicker at one At lits thicker end and und side edges the body is chamfred thereby providing the heat passageway above alluded to, and the body is provided at itsthicker end and side cesses which communicate at `their-*inner ends with thev chamfered ports upon" which the brick is The body is further provided along its lonedges with grooves adapted to receive the supports whereby the bricks in one row of the wall structure may have direct contact with the bricks .in the adiacent rows thereby l bricks along their ent-ire perimeter inthe Wall structure and preventing one or more bricks from being dislodged from" vthe same and opening a gap.

In the accompanying drawings- 7 Figurel is a longitudinal sectional view of a locomotive boiler furnace'showing the brick in position therein. f Fig. 2 is a fragmentary transverse sectional view of the same. -v

Fig. 3 is an enlarged fragmentary view of the arch wall vand supports.

Fig. 4 is a sectional view taken-on the line 4 4 of Fig. a.

Fig. 5 is an end view-ofabrick showing x the furnace and extendv along in the usual manner.

ing 4,' which also passes the boiler. spaced relation in fthe through the front and that water from the boiler 1v may pass freely around 4the saidtubes and traverse the length of the furnace. The tubes ,fargparallel with each other W forwardly.

Patented A'lig. 13,1918.

a perspective view of one of the:

Fire tubes ,0,1' flues 3, are connected wlth the inner sldejof furnace 2 vand .passy rear4 sidestlie'reofso .5,5 end .than at the :otherfij: er :side and bef portions with reportion and serve .to divide and lead the heat over the supplali- Fig. 1 of the `drawing the the 'boiler- 1.. Y, The furnace is pro-' vided at its front side with a fuel inlet open-,f throughA the front :ofi

W'ater tubes 5 are located inlroo Their rear ends fareA connected with the end 'sheet of the furnace at points above the upper edge of the opening 4L and their'forward ends vare connected with the lopposite sheet of the furnace at points below the .lower edge of the opening 4. and

belowaiheues 3.

A grate 6 is located in the lower portion of the furnace 2. These kparts and theirarrangement are conventional, hence furtherv descriptionin this respect is unnecessary.

The septum wall which is composed of i vthe-bricks, to be described, is mounted on the tubes as shown in Fig. l of the drawing,

wherein it will be seen that thesaid wall is in an inclined position and extends from the inner sheet of the furnace 2' to a line which deposits upon the grate for consumption and nally thereof. The surfaces 8 and 9 are dis-- the flues are kept free from accumulation of particles of the fuel.

- The septum wall is composed of bricks of vespecial desi n and configuration and as all of these bric s are of identical dimensions, patternand shape a description of'one will 4suiice. i j

brick includes a body 7 of clay or. The body is pro' Each other' suitable material. vided at its under side with a concaved surface 8 disposed longitudinally thereof. At its upper sidethe said body is provided with a convexed surface .9 also disposed longitudiposed at an acute angle to each other longitudinally of the body, consequently the body is thicker transversely at one end than at the other. The body is rectangular in shape 1n top plan. At its upper side the body is provided with a hollow 10, which reduces the material and rweight of the body. At its thicker end and between its side edge p0rtions the body l'i' is chamfered as at 11. This chamfered surface or cavity leads in from the end of the block and terminates at an edge located between the ends of the concaved surface 8.

Recesses 12 are provided at the thicker end of the body 7 and the said recesses lead in from the side edges of the body and communicate at their inner ends with the chamfered cavity 11 at points between the surfaces 8 and 9 of the body and spaced therefrom.Av y y v The body 7 is further provided at its side edge portions with grooves 13 which traverse the length of the body.

When the bricks are assembled inthe form of a septum wall on the tubes 5, the said tubes are received in thel grooves 13 whereby the edges of the bricks in the adjacent rows of bricks come in direct contact with each other as best shown in Figs. 2 and 3 of the drawing. In each row of the bricks the thinner end of one brick is in direct con tact with the thicker end of the next adjacent `'brick so that the upperv ends ofthe chamfered cavities 11 are left open and unobstructed as best shown in Fig. 4.. Hence all of the bricks are confined along all of their edges and securely held in position in the wall structure.

As the gas'ascends from the grate and strikes the septum wall it passes through the chamfered cavities 11 and is thereby separated into relatively small streams or volumes by the bricks of the wall and thus separated pa ss to and through the fines 3. This effects a uniform distribution of the heat among the flues and does not subject the lower lues to a hotter blastthan that supplied to the upper flues. Hence one set of flues will not burn out or spring leaks earlier than any other set, as a consequence of nonuniformity of the heating.

By reason of the shape of the bodies of the bricks, each row of bricks is in the form of an arch as shown in Fig. 2 and these arches extend longitudinally of the furnace and serve to retain the heat against the lower portions of the tubes thus facilitating the heating of the water in the same and the production of steam in the boiler. By reason vof the Specific conguration of the bodies of the bricks, they may be ar ranged with the ends of the arches ofthe same level or at different levels as shown in Fig. 2 and as desired. The recesses l2 serve as passageways for conducting the heat from the chamfered cavities, 11 and hence additionally separate or split the volumes or streams of gas which emerge from the cavi- Vties before passing to the fire tubes or flues 3. These also materially assist in diffusing the heat over the crown sheet of the furnace and boiler thereby preventing warpage and leakage at the joints of the same.

Having described the invention, what l claim as new and desire to secure by Letters Patent is 1. A brick comprising a body provided at its under side with a concaved surface and at its upper side with a convexed surface, said surfaces being disposed at an acute angle with relation to each other longitudinally of the body, the under portion of the body being chamfered at one end, and the upper convexed surface having a depression formed therein.

2. A brick comprising a body .provided at its under side with a concaved surface and at its upper sida with a convexed surface, said surfaces being disposed at an acute angle with lrelation to each other longitudinally of the body, the under portion ofthe body being chamfered at one end, the body.

t ehamfered being vfurther provided at its edge portions with recesses which communicate with the ortion.

3. A bric comprising a body provided at its under side with a concved surface and at' its upper side Witha, convexed surface, said surfaces being dlsposed at an acute angle With .relation to each other` longitudivio 'l' .tions with recesses *the chamfered portion.

nally of the body, the under portion ot the body being chamfered at its thicker end,the body being further provided at its edge por- Whieh communicate with A4f. A brick comprising a bodyl provided at itsunder sidewith a concuved surface and at its upper-side with a donvexed surface, said surfaces belng disposed at an acute angle with relation to each other longitudinelly of the body,

the under portion of the body being chamered at one end and between its side edges, the body being further provided at its edge portionsvwith recesses Which communicate With-the chamfered portion.

5. A brick comprising a body provided at its under side with aconcaved surface/and at its upper side with a conVeXed surface, said surfaces being disposed at an acute angle w'ithrelation to each other longitudinelly of the body, the under portion of the body beingA chanifered -at one end and between its side edges, the body being further' provided at its edge portions with recesses which communicate Withthe c'liainfered portion and provided at. its side edges with longitudinally disposed grooves.

In testimony whereof I aiiix my signature.

EDWARD M. CARRLL. 

